Cell Membrane and Cell Transport

Front

What is the function of the cell membrane?

Back

The cell membrane regulates what enters and leaves the cell, maintaining homeostasis.

Front

Define hypotonic solution.

Back

A hypotonic solution has a lower concentration of solutes compared to the inside of the cell, causing water to enter the cell.

Front

What happens to a cell in a hypertonic solution?

Back

The cell shrinks as water moves out of the cell to balance solute concentrations.

Front

What does selectively permeable mean?

Back

Selectively permeable means that some molecules can cross the membrane while others cannot.

Front

What is osmosis?

Back

Osmosis is the movement of water across a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

Front

What is the role of transport proteins in the cell membrane?

Back

Transport proteins help move substances across the cell membrane that cannot pass through the lipid bilayer.

Front

Define isotonic solution.

Back

An isotonic solution has the same concentration of solutes as the inside of the cell, resulting in no net movement of water.

Front

What is the effect of placing a cell in distilled water?

Back

The cell will swell and may burst due to water entering the cell.

Front

What is active transport?

Back

Active transport is the movement of molecules against their concentration gradient, requiring energy.

Front

What is passive transport?

Back

Passive transport is the movement of molecules across the cell membrane without the use of energy, following the concentration gradient.